Question

如果任何人可以帮助我在PHP中我将非常感谢。我是一个新的PHP和我正在研究一个项目，我的部分是使用文本框获取输入并将其保存到文本文件带时间戳。我能够做到这一点，我的代码工作正常。但我无法做一些要求，例如让计数器输入了多少条目，如果条目是重复的，则不要添加到文件中。我尝试包含一个计数器，它总是显示1作为文件重新加载每次。我想要一个文本框再次获得更多的条目，我正在重新加载它。

<h1>please scan your student id card :)</h1>
<form action = "barcodeHandler.php" method = "POST">

<input type = "text" name = "barcode" style= "width:400PX; height:40PX;opacity:10" autofocus>
<input type = "submit" style= "width:0px; height:0px;opacity:0;" value = "barcodeSubmit" >

</form>

<?php
   $counter = 0;
//$filePath = getenv("HOMEDRIVE").getenv("HOMEPATH")."\Desktop";     // use this when using windows will give user desktop dir
//$filePath = "/Applications/XAMPP/xamppfiles/htdocs/PHP_Lessons/project"; // setting file directory
$filePath = "./";

$course = "MCI";
$extensionOfFile = ".txt";
$dateForFile = date ("d_m_Y");

$fileName = "/$course"."_"."$dateForFile"."$extensionOfFile ";             // name of the file 

if(!empty($_POST['barcode']))
{
    $barcode = $_POST['barcode'];        // getting barcode
    $time = time();                      // unix time stamp
    $actual_time = date('H:i:s',$time);   // actual time
    $file = $filePath.$fileName;
    $entry = $barcode .", ".date ("d-m-Y"). " ".$actual_time;  // putting in the data in variable
    $handle = fopen("$file",'a');          // open a file
    fwrite($handle,$entry."\r\n");       // "/r/n" will give a line break
    fclose($handle);                 // free the file
    //echo date_default_timezone_get();    // if required to check the timezone of the server

     $counter++;

}
echo $counter;
header("location :barcodeHandler.php");    // redirect to the form
?>

Answer 1

您的计数器只会返回1，因为它不会计算文件中已存在的条目。

<h1>please scan your student id card :)</h1>
<form action = "barcodeHandler.php" method = "POST">

<input type = "text" name = "barcode" style= "width:400PX; height:40PX;opacity:10" autofocus>
<input type = "submit" style= "width:0px; height:0px;opacity:0;" value = "barcodeSubmit" >

</form>

<?php
   $counter = 0;
//$filePath = getenv("HOMEDRIVE").getenv("HOMEPATH")."\Desktop";     // use this when using windows will give user desktop dir
//$filePath = "/Applications/XAMPP/xamppfiles/htdocs/PHP_Lessons/project"; // setting file directory
$filePath = "./";

$course = "MCI";
$extensionOfFile = ".txt";
$dateForFile = date ("d_m_Y");

$fileName = "/$course"."_"."$dateForFile"."$extensionOfFile ";             // name of the file 

if(!empty($_POST['barcode']))
{
    $barcode = $_POST['barcode'];        // getting barcode
    $time = time();                      // unix time stamp
    $actual_time = date('H:i:s',$time);   // actual time
    $file = $filePath.$fileName;
    $entry = $barcode .", ".date ("d-m-Y"). " ".$actual_time;  // putting in the data in variable
    $handle = fopen("$file",'a');          // open a file
    fwrite($handle,$entry."\r\n");       // "/r/n" will give a line break
    fclose($handle);                 // free the file
    //echo date_default_timezone_get();    // if required to check the timezone of the server
    $countExisting = count(explode("\r\n", file_get_contents($file))) - 1; // minus 1 as every row has \r\n appended

     $counter = $countExisting;

}
echo $counter;
header("location :barcodeHandler.php");    // redirect to the form
?>

这应该做你想要的。

PHP计数器计算输入的进入者数量

1 个答案: